Abstract
The measurements of microwave pulses of gigawatt power level have a lot of constraints. A receiving antenna is a starting and core point of the measurement system. Waveguide based and dipole antennas have a limited wide bands, while the use of commercially available wideband antennas is restricted by their maximum peak power acceptances. The design of the wide band antenna with the small effective area was proposed. The characteristics of prototype were obtained in numerical simulations with ANSYS HFSS software and by calibration tests in the frequency band of 1–13 GHz. It has the effective area about the 1 mm2 in X-band and square-law dependence on the wavelength in a wide band. The cross polarization rate is more than 60 dB at the centre position and not less than 30 dB within the range of ±5° in azimuth and elevation angle. The wide beam radiation pattern forces a user to discriminate reflected signals. This antenna could greatly simplify the measurement system, replacing a set of narrow band antennas that connected to several recording channels.
Highlights
The progress in pulsed power technologies resulted in development of high power microwave (HPM) sources for the last decades
We propose the antenna with the effective area of square millimetres
The proposed antenna properties were confirmed in numerical simulations and calibration tests
Summary
The progress in pulsed power technologies resulted in development of high power microwave (HPM) sources for the last decades. It should be capable to operate at high power density level (~ 100 kW/cm2) It should be of the low effective area to prevent a breakdown in the transmitting lines, that limits one to use commercially available wide band antennas. The coaxial based dipole antennas are preferable at L, S and C-bands as a sizes of waveguides rise with a wavelength (Figure 1, b). Both types of these receiving antennas has the limited operating band. During a testing and tuning a HPM generator, experimenters commonly deal with some specific modes of generation those have few concurrent frequencies or valuable harmonics in the output spectrum These frequencies and harmonics might be out of working band of receiving antenna. The results of numerical simulation and measured characteristics of real antenna we proposed are presented
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
